CVE-2026-103584: The Wikimedia Foundation Mediawiki Commonsmetadata Extension

Low severity, CVSS 1.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki CommonsMetadata extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki CommonsMetadata extension: 1.46, 1.45, and 1.43.

Affected products

• The Wikimedia Foundation Mediawiki Commonsmetadata Extension: version 1.46 only; version 1.45 only; version 1.43 only

Published 2026-09-30. Last modified 2026-10-01.